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Civil Engineering Objective Questions { Steel Structure Design }



64. According to I.S. 800 - 1871, lacing bars resist transverse shear equal to
A. 1.0% of the axial load
B. 2.0% of the axial load
C. 2.5% of the axial load
D. 3.0% of the axial load

65. The thickness t of a single flat lacing should not be less than
A. ?1 th length between inner end rivets 30
B. ?1 th length between inner end rivets 40
C. -1- th length between inner end rivets 50
D. ?1 th length between inner end rivets 60

66. In double lacing, the thickness t of flat lacing is
A. t < 4-0- th length between inner end rivets
B. t < -5-0 th length between inner end rivets
C. t < ?60 th length between inner end rivets
D. t < ?1 th length between inner end rivets 70

67. Perforated cover plates are particularly built up sections consisting of
A. channels placed back to back
B. channels placed toe to toe
C. four angle box section
D. all the above.

68. The equivalent axial load may be defined as the load which produces a stress equal to
A. maximum stress produced by the eccentric load
B. maximum stressed fibre
C. bending stress
D. none of these.

69.  For eccentrically loaded columns, the bending factor is Cross-sectional area of column
A. radius of gyration
B. Cross-sectional area of column
C. section modulus of the section
D. Cross-sectional area of column

70.  On eccentrically loaded columns, the equivalent axial load may be obtained by
A. adding the axial load, eccentric load, the product of the bending moment 'due to eccentric load and the appropriate bending factor
B. adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor
C. dividing the sum of axial load and eccentric load by the product of the bending moment and appropirate bending factor
D. none of these.

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